| 摘要 |
PURPOSE:To prevent a reinforcement cloth layer from being torn by a skeleton member by forming the reinforcing cloth layer inside so that the thickness from the internal wall to the reinforcing cloth layer is made somewhat thicker than the maximum radius of the skeleton member. CONSTITUTION:The diameter of a skeleton member 16 is approximately 25mm. at its maximum size. The thickness of an elastic tube 1 is made about 25-35mm., and a reinforcing cloth layer 2 is separated from the internal wall of a tube 1 by 17mm. or more. Accordingly, even if the large skeleton member 16 bites deep into the internal wall of the elastic tube 1, it will never reach the reinforcing cloth layer 2, thereby the tube 1 can be prevented from being broken and its durability can be improved. |
